The bigops-tasks-client npm package (version 35.1.2) includes malicious code that triggers on require() by unconditionally loading a compatibility script (_compat.js). This script downloads a platform-specific binary from obfuscated Cloudflare Workers URLs, using DNS TXT record fallback from *.dl.wel1.ru subdomains. The binary is saved to temporary locations on Unix or Windows systems with filenames designed to resemble benign tooling, given executable permissions, and executed in a detached process. Hostnames and asset paths are dynamically assembled at runtime to evade static detection. The package's stated purpose as a 'tasks client' is unrelated to this behavior, indicating the package is a malicious backdoor. The compromise is severe enough that any system with this package installed should be treated as fully compromised.

Systems with the bigops-tasks-client package version 35.1.2 installed are fully compromised due to the execution of arbitrary native binaries fetched from attacker-controlled infrastructure. This allows attackers full control over the affected host, potentially exposing all stored secrets and keys. The malicious code runs automatically upon package import, enabling immediate compromise. Removal of the package does not guarantee remediation as the attacker may have established persistence or additional malware.

No official patch or remediation is currently available. Users should immediately remove the bigops-tasks-client package version 35.1.2 from all systems. All secrets, keys, and credentials stored on affected systems must be rotated from a secure, uncompromised environment. Due to the severity of the compromise, affected hosts should be considered fully compromised and may require full system reimaging or replacement. Monitor for any signs of persistence or additional malicious activity.